On 12/06/2012 04:12 AM, Johannes Meixner pecked at the keyboard and wrote:
Hello,
On Dec 4 23:55 ellanios82 wrote (excerpt):
-after using YAST to verify my printer HP PSC 1510 Series , the YAST test Print is OK
However, when i try to print from LibreOffice, Gimp, Okular the result is either a blank page with nothing on it , or occasionally a poor quality not satisfactory print
- this is puzzling because the Yast Test Print for Cups is Good.
I guess the difference is that the YaST test page is PostScript (more precisely clean generic simple PostScript) but what applications like LibreOffice, Gimp, Okular submit as print job data is "sophisticated PostScript" or nowadays often PDF.
Usually even "sophisticated PostScript" prints well but "since ever" PDF printing had and has various issues.
The PDF processing by the printing system is substantially different compared to the PostScript processing because for PDF there is an additional conversion step via /usr/bin/pdftops (provided in the poppler-tools RPM) that converts PDF to PostScript.
There are several bug reports regarding PDF printing issues.
A few examples: https://bugzilla.novell.com/show_bug.cgi?id=738532 https://bugzilla.novell.com/show_bug.cgi?id=776080 https://bugzilla.novell.com/show_bug.cgi?id=781660 https://bugzilla.novell.com/show_bug.cgi?id=781193 ...
Background information:
When CUPS gets PDF it runs /usr/bin/pdftops to convert it into generic PostScript because CUPS needs generic PostScript so that it can add the PostScript snippets from the PPD file to enable this or that printer specific option (like media A4 versus media Letter or printing resolution and so on).
The underlying reason is the switch from PostScript to PDF as the standard print job format in various applications, compare https://bugzilla.novell.com/show_bug.cgi?id=732442
This change is advocated by the OpenPrinting workgroup of the Linux Foundation and the CUPS author, see "PDF as standard print job format" at http://www.linuxfoundation.org/collaborate/workgroups/openprinting
See also "PDF: The future common printing format" at http://en.opensuse.org/Concepts_printing
For my personal opinion see https://bugzilla.novell.com/show_bug.cgi?id=732442#c5
Kind Regards Johannes Meixner
Here, I have to agree with your opinion. It is quite clear the cups author knows little if anything regarding duplex printing and it's need in the business world. Is there any possibility of have a "pre-PDF" version of cups made available for openSUSE 12.2? -- Ken Schneider -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org